Sharon knows that nothing can bring her son back, but she is desperate for London's gang culture to be tackled head on

Jordy, a former member of the deadly Woolwich Boys street gang who features in the series, explained why insights like this are so important.

He said: "I want to show other people that it just isn’t worth it, I survived it and now this is my time to tell everyone. I feel like I’ve got a message and a story to tell now to stop other people ganging it.